Assig-nok to the jsitce macbeth engine



Amat-JMLE@ J. B. SIMLER COOLING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed July 14 1920 sax May. 29

Patented May 29, i923.

UNITED STATES PATENT OFFICE.

JAMES B. SIMLER, OF CLEVELAND, OHIO, SSTGNR TO THE BRUCE MACBETH ENGINE COMPANY, or

CLEVELAND, 53H10, A. CORPORATION OF OHIO.

COOLING BEVICE FOB.- TNTERNAL-COIIEB'USTION ENGINES.

Application led July 14,

To all whom t /moj/ concern.'

Be it known that l, diurne B. Sinin-1n, a citizen ci? the United Statesi resident ci Cleveland, county oil Cuyahoga, and Lit-:itc ot Ohio, have invented new and use'lul linproveinents in Cooling Devices for Internal- Coini'iustion Engines, oit which the following` is a specification, the principle of the invention' being herein explained, and the best inode in which l have contemplated applying that principle, so as to distinguish it from other inventions.

My invention relates to internal combustion engines, and particularly to means for controlling` the temperature ot moving parts, in which it is desirable not to perinit overheating. The object of the invention is to provide a simple and etlicient device tor controlling' the temperature of the pistons, whereby overheating ol the latter is prevented, and a desired low temperature secured and maintained.

rThe said invention consists ot' means hereinafter ltully described and particularly set forth in the claims.

As is well known, the pistons et internal combustion engines become heated to a lmarked degree during the operation ot the engine. These pistons are usually hollow 3 and contain. under the present practice, a

volume ot air which is deadP-that is, this air in the interior oi these pistons does not circulate, and as a result radiation ot heat :trom the pistons and their consequent cooling. is interfered with. My invention contemplates the provision ot means for creatingr a. circulation in the interior of the engine housing, whereby the gaseous content of the interior ot the pistons is displaced, and a 40 cooling; eii'ect upon the pistons produced.

The annexed drawing; and the following description set tort-h in detail certain means embodying niy invention. the disclosed means, however, constituting but one of the various mechanical forms in which the principle ot the invent-ion may be applied.

In said annexed drawing:

Figure l represents a vertical section of an accepted, well-known type oit stationary 50 internal combustion engrine`r the latter being' shown fitted with my invention.

Figure 2 represents, on an enlarged scale, a vertical section of an oil-separator used in connection with roy invention.

The illustrated embodiment ot my said 1920. serial No. 396.177.

invention comprises a duct l, made of piping o t` a .suitable diameter, the upper end ot this duct being connected with the air intake 2. The opposite end of this duct extends into the piston, as shown, and includes a section 3, which is fixed to the interior oi' the piston and has aV sliding connection with the inain or stationary portion of the duct l. The latter is prete 'ably caused to enter the engine housing through the crank case 4, whence it passes upwardly into the cylinder and connects with the movable section 3. The crank case 4 may be an enclosed cha-1nbcr, in which case it will be provided with a breathing opening 9 through which air may be expelled from and drawn into the casing on reciprocation of the piston, or it may be of open construction.

The air passes through the intake in the direction indicated by the arrow, creates a flow ot the `gaseous content of the piston out ot the latter, through the duct, and into the air intake, as will be readily understood. lt will therefore be noted that the resulting displacement ot the gaseous content of the piston is effected by exhaustion, and is compensated for by the atmospheric air which enters the crank case directly and through the opening therein, the `[low of which is induced by the difference in pressure between the atmosphere and the interior of said piston. This displacement is continuons while the engine is in operation and the required circulation is thus effected.

A. valve 5 is preferably introduced in the duct l for regulating this flow.

Inasinuch as considerable oil in the form of vapor is contained in the gaseous content of the interior ot the crank casing, l provide means in the 'form of an oil separator 6, for separating such oil therefrom. This separator is placed in the path of liow in the duct, and preferably outside the casing, as shown in the drawing. It consists of any well-known type of separator and its discharge duct 7 is caused to pass back through the crank case and to discharge into the latter, thereby permitting,r the recovered oil to be re-introduced into the interior of the crank case. The end 8 of this discharge tube is preferably U-shaped to form a trap, as shown.

While but a single cylinder engine is shown to which my invention is applied, it is, ot course, obvious that as many of these devices may be used as there are "pistons in the engine,` or as may be found necessary.

Vhat I claim is:

.1. In an internal combustion engine, the combination of a crank case; a cylinder; a reciprocating piston in said cylinder and having a hollow chamber' communicating with said crank case; and means extending into said chamber for establishing communication between the opposite sides of the piston to directly displace the gaseous content ofy said chamber' by exhaustion; the interior of said crank case being directly connected with the atmosphere whereby a iow of atmospheric air is induced and caused to compensate Afor such displacement.

2. In an internal combustion engine, the combination of a crank case; a cylinder; a reciprocating piston in said cylinder and having a hollow chamber communicating y With said crank case; an air intake passage for admitting air to the interior of said cy1- inder; and a pipe leading from said air intake passage to and extending into the hollow chamber of said piston, whereby the gaseous content of said chamber is displaced by exhaustion; said crank case being directly connected with the atmosphere whereby a flow of atmospheric air is induced and caused to compensate for such displacement.

Signed by me, this 3rd day of July, 1920,

JAMES B. SIMLER. 

